Train No 339 leaves Abohar every night to reach Bikaner next morning. Over a period of time it has come to be known as “Cancer Train”. This train has acquired the dubious reputation simply because nearly 100 cancer patients travel by it from Punjab to Bikaner for diagnosis and treatment at the Acharya Tulsi Regional Cancer Treatment and Research Institute.

Pesticides are commonly used in India but this comes at great cost to human health. The Centre for Science and Environment decided to investigate the matter and looked at the agricultural heartland of Punjab. It found that 15 different pesticides in the 20 blood samples tested from four villages in Punjab. But what is more important to find out is how much of pesticide in blood is ‘safe’. Does a safety threshold level exist? If yes, how do scientists — and the industry — compute it?